This efficiency is possible thanks to the combustion engine's use of optimised cooling and a 200bar six-point direct fuel injection system, while the electric motor benefits from declination coils that allow it to work with a claimed 95% efficiency.
Drive is sent to the front wheels via a six-speed DCT dual-clutch automatic gearbox that's been optimised to offer as much as 97.5% efficiency - another class-leading feature, according to Hyundai.
The Ioniq Electric features an uprated lithium-ion battery pack, and is good for an estimated 155 miles of range. Its electric motor produces 118bhp and 218lb ft of torque, with drive channelled through a single-speed transmission. In this form, the Ioniq has a top speed of 103mph.
A key standard feature of the electric model is rapid charge compatibility: it can be charged to 80% capability in 33min from a 50kW CCS Combo Rapid public charger. Owners can also plug their car into a conventional domestic charger. To help boost energy when on the move, the Ioniq Electric features regenerative braking which can be adjusted via steering column-mounted paddles.
The model is built on a brand new platform, which is shared with sister brand Kia's Niro crossover. Hyundai says the new model's chassis has been optimised to deliver "responsive handling while remaining efficient in each of its three powertrain configurations". It's made up of a mix of Advanced High Strength Steel - the material contributes a significant 53% to the structure - and aluminium, which is used for the bonnet, boot and suspension components and shaves 12.6kg off the car's weight.
Hyundai's handling claims appear to be backed up by the fitment of dual-lower arm multi-link suspension at the rear, while the batteries have been located in the car's floor to lower its centre of gravity.
The new alternatively fuelled Ioniq also offers “class-leading aerodynamics”, according to Hyundai.
The vehicle’s exterior styling is said to make it very slippery through the air, reducing drag and enhancing fuel economy. At the front Hyundai’s hexagonal grille incorporates moving flaps that can direct airflow over the car.
Hyundai has gone for a clutter-free approach, combining “efficient use of interior space and a clear, logical approach is applied to the layout of control functions”. The interior is said to be constructed with eco-friendly materials.
Android Auto and Apple CarPlay smartphone mirroring feature on the Ioniq, plus TomTom Live sat-nav. A wireless smartphone charging mat is also available.